# Questions tagged [trigonometry]

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### Interpreting multiple circular-circular regression output

I'm new to circular stats and have been playing with circglmbayes and bpnreg. I'm not sure how to interpret the output. I have consulted the CrossValidated database, and the papers/tutorials ...
46 views

### Smooth Curve Fit

I uses supsmu to fit a smooth curve to a scatter plot of data . I am quite new to curve fitting, but my graph looks somewhat sinusoidal. What would you recommend in terms of next steps to determine a ...
102 views

### Sine curve fit and model tunning using nls in R

I acquired data (motor adaptation =y in function of delays =t ) which I expect to look like a sine wave. I am trying (1) to fit a sine curve in my data and (2)to estimate the best model/parameters. I ...
545 views

### Sine curve fit using nls in R

I acquired data (motor adaptation $y$ as a function of delays $t$ ) which I expect to look like a sine wave. I am trying (1) to fit a sine curve in my data and (2) to estimate the best model/...
18 views

### Sine curve fit using lm, nls and nls2 in R [closed]

I acquired data (motor adaptation =y in function of delays =t ) which I expect to look like a sine wave. I am trying (1) to fit a sine curve in my data and (2)to estimate the best model/parameters. I ...
28 views

### Fourier series question I need help with

For the case of $a_n$ I am confused how my notes say we have 1 for the case n = 0. When calculating this integral for sin(nx) when n=0, we should also get zero as at x=0, sin(x) is 0. I must be ...
21 views

### Gaussian like distribution with two tangents

I am looking to find a fitting model for the following data : P = [1.0000,0.7368,0.3421,0] phi = [0,pi/4,pi/2,pi] Which is the normalized azimutal distribution ...
1k views

### What is distribution of $\sin(x)$? If x is exponential distribution

I am trying to find analytically the distribution of $\sin(x)$, If x belongs to an exponential distribution,
31 views

### Which trigonometric function I should use to generate the temperature with two peaks (i.e.one strong and one moderate peak)?

I want to generate seasonal temperature of Bay of Bengal. I want to do this with a trigonometric function. Seasonal temperature of Bay of Bengal has two peaks. One major peak during April and another ...
404 views

### Mean and variance of $\tan(\mathcal{N}(\mu,\,\sigma^{2}))$

How could we find the mean and variance of $\tan(\theta )$ if $\theta \sim \mathcal{N}(\mu,\,\sigma^{2})$?
Consider data consisting of pairs $(y_i, x_i)$ for $i = 1,..,n$ arising from a non-linear regression model: $y_i = \alpha + \beta\sin(\omega x_i + \delta) + \epsilon_i$ where \$\epsilon_i \sim N(0,\...